Combined heel, forepart and cement-lasting machine

ABSTRACT

A combined heel, forepart and cement-lasting machine having a last holder and a carriage. The carriage carries a heel-band, a pair of wipers and the like, and also a tripping blade which is associated with a switch. The switch controls a motor which displaces the last holder in a direction towards the tripping blade. The switch stops the motor when the last holder comes in contact with the tripping blade wherein the last holder is in a precise position to apply cement to proper locations on the last. The tripping blade is also adjustably disposed on the carriage to adjust the position of the last with respect to the edge of the wiper in the operating position of the last holder.

United States Patent Schindler et al. 145] Apr. 25, 1972 1 41 COMBINED HEEL, FOREPART AND 1561 memes cued CEMENT-LASTIN G MACHINE I N T STATES PATENTS [72] Inventors: Herbert Schindler, Pirmasens; Gerhard 3,090,980 5/1963 Forma 12/ l 2.5 Winter, Havenstein, both of Germany 3,409,921 1 l/ l968 Stein et al ..l2/l2.5 73 Assignee: Flrma Schon & cu. Gesellschalt mit P nmary Examiner-Pamela D. Lawson zejfigrrankter Haltung, Prrmasens, Ger- A"amey fiiedman & Goodman 122 Filed: July 30, 1970 [57] ABSTRACT [21 1 App]. No.: 59,484 combined heel, forepart and cement-lasting machinehaving a last holder and a carriage. The carriage carries a, heel-band, a pair of wipers and the like, and also a tripping blade which is l 30} Ford! Appnimm Priority Data associated with a switch. The switch controls a motor which A 5' 1969 G up 39 7489 displaces the last holder in a direction towards the tripping ug ermany blade. The switch stops the motor when the last holder comes 52 us. c1. ..12/12.s 12/127 in with "iPPinE blade wherein the is [51] In. Cl. A4311 21/00 i 3/00 a precise positionto apply cement to proper locations on the 58] Field 12/105 12.5 1 127 12.4 last. The tripping blade is also adjustably disposed on the carriage to adjust the position of the last with respect to the edge of the wiper in the operating position of the last holder.

3 Claims, 3 Drawing Figures PATENTEDAPR25 I972 3. 657, 756

SHEET 1 BF 2 INVENTORS Herbert w hi ndlm- 8. (hrrhm-dt n er Attorneys PATENTEUAPR 25 1912 3, 657. 756

sum 2 OF 2 INVENTORS Herbert Suhindcr K1. (icr'h' r'dt Winter MACHINE BACKGROUND OF THE INVENTION U.S. Pat. No. 3,409,921 relates to a combined heel, forepart and cement-lasting machine having a last holder and a carriage horizontally movable towards the heel portion of the last to carry a heel-band, a pair of wipers and the like. The characterizing feature of the invention taught by the above patent is that the carriage also carries a tripping blade arranged at the level of the heel contour, which disconnects the movement of the carriage with the operative devices carried thereby when the carriage executes a movement towards the heel portion of the last, the disconnection taking place in a precise position with respect to the last even when the last thimbles exhibit I clearances up to millimeters relative to their position to the end of the last when a series of lasts from the smallest to the distances complicates the lasting process, makes it more difficult and impairs its results since the wrap-in portion becomes nonuniform so that the head of the cement applicator device, the position of which relative to the last carrier is very precisely determined, fails to apply the cement to the proper locations.

SUMMARY OF THE INVENTION In accordance with the present invention shortcomings of this nature are eliminated in that the last-carrier is made adjustable in a direction towards the tripping blade and is actuated by a motor, the motor-tripping switch being associated with the motor itself for the purposes of disconnecting the latter. The arrangement operates in such a way that last-carrier feed is terminated by stopping the motor in a correct position with respect to the carriage and the head of the cement applicator device when the last-carrier comes into contact with the tripping blade.

BRIEF DESCRIPTION OF THE DRAWINGS The invention will now be described in greater detail with the aid of an embodiment shown in the accompanying drawing, in which:

FIG. I is a side-view in section, details being eliminated for the sake of clarity,

FIG. 2 shows a detail of FIG. I in section, and

FIG. 3 is a front view of the same detail.

DESCRIPTION OF THE PREFERRED EMBODIMENT The hydraulic motor 1 is actuated via electro-hydraulic servo-control means (not shown), whereupon the motor moves the last-carrier 5 by way of a spindle 2, a nut 3 and a bracket 4, causing the last-carrier to pivot around a joint 25 so that it moves out of its initial position 5' shown in a dashed line (FIG. 1)and into its operating position shown by a solid line. The movement takes place in a direction towards the cutter or wiper head 6 (FIG. 2) where the last 7 comes into contact with the tripping blade 8 with its heel portion and so displaces the blade that the latter actuates an electric switch 11 by way of adjusting elements including a lever 9-and a set-screw 10. In response, the switch 11 stops the hydraulic motor] by means of a hydraulic servo-control device (not shown) and thus arrests the advance of the last-carrier. The pressure then exerted by the cutter l2 and the heel-band 13 against the last is absorbed by the spindle 2, which locks the last-carrier 5 in this operating position.

The carriage 16 with devices 8, 9, l0 and 11 mounted thereon can be horizontally displaced by means of a set-screw I4 and a compression spring 15. It is thus possible to adjust the position of the last 7 with respect to the edge of the cutter 12. When the. last carrier 5 has reached its operating position, the heel-band 13 is moved in a direction towards the last 7.

After the termination of the working cycles, the machine is returned to' its initial position 5' either by means of a time relay or by a foot-operated switch; a limit switch (not shown) defines the initial position.

Details of the cement. applicator device 26 have been omitted. Since the operating position of the last-carrier 5 is adjustable in response to the last measurements, as determined by the tripping blade 8 while the position of the cement aplargest is accommodated This variationindearance or plicatordeviceinthe machineisnotadjustable, atthe start of' the working cycle all the operating devices are in correct positions with respect to the last and the respective part of the shoe carried thereby.

For a fuller description of the combined heel, forepart and cement-lasting machine, reference may be made to the abovementioned patent, U.S. Pat. No. 3,409,921, wherein many of the elements thereof are similar to the elements of this invention, with similar elements performing similar functions, whereby this invention is an improvement over said abovementioned patent.

Numerous alterations of the structure herein disclosed will suggest themselves to those skilled in'the art. However, it is to be understood that the present disclosure relates to a preferred embodiment of the invention which is for purposes of illustration only, and not to be construed as a limitation of the invention.

What is claimed is:

1. A combined heel, forepart and cement-lasting machine comprising a cement applicator, a last-carrier for holding a last, said last having a heel portion, a carriage horizontally displaceable towards the last heel portion, a pair of wipers disposed on said carriage, a slide device accommodating a heel-band and movably disposed on said carriage to move said heel-band towards the last heel portion, a tripping blade disposed on said carriage, motor means for displacing said last-carrier towards said tripping blade such that said heel portion contacts said tripping blade, and switch means associated with said tripping blade for controlling said motor means, wherein said switch means stops said motor means when said heel portion contacts said tripping blade to obtain a precise position of the heel portion opposite said cement applicator during a working cycle to permit precise application of cement to the last.

2. A combined heel, forepart and cement-lasting machine according toclaim 1, including means for adjustably mounting said tripping blade and 'said switch means on said carriage to 

1. A combined heel, forepart and cement-lasting machine comprising a cement applicator, a last-carrier for holding a last, said last having a heel portion, a carriage horizontally displaceable towards the last heel portion, a pair of wipers disposed on said carriage, a slide device accommodating a heelband and movably disposed on said carriage to move said heel-band towards the last heel portion, a tripping blade disposed on said carriage, motor means for displacing said last-carrier towards said tripping blade such that said heel portion contacts said tripping blade, and switch means associated with said tripping blade for controlling said motor means, wherein said switch means stops said motor means when said heel portion contacts said tripping blade to obtain a precise position of the heel portion opposite said cement applicator during a working cycle to permit precise application of cement to the last.
 2. A combined heel, forepart and cement-lasting machine according to claim 1, including means for adjustably mounting said tripping blade and said switch means on said carriage to control the operating position of said last-carrier.
 3. A combined heel, forepart and cement-lasting machine according to claim 1, wherein said cement applicator is fixed relative to both said last-carrier and said carriage, said carriage and last-carrier being operatively associated with one another to precisely position the last heel portion opposite said cement applicator. 